By 1954, he had regained the rights to Dianetics and founded the Church of Scientology, which remains the largest organization promoting Scientology. There are practitioners independent of the Church, in what is referred to as the Free Zone. Estimates put the number of Scientologists at under 40,000 worldwide.

Since its inception in 1954, the Church of Scientology has been involved in a number of controversies, including its stance on psychiatry, Scientology's legitimacy as a religion, the Church's aggressive attitude in dealing with its perceived enemies and critics, allegations of mistreatment of members, and predatory ...

Los Angeles, California, has the largest concentration of Scientologists and Scientology-related organizations in the world, with the Church of Scientology's most visible presence being in the Hollywood district of the city.

R6 Implants (Incident II) The R6 Implants were the work of the Galactic Confederacy's tyrannical leader, Xenu, 75 million years ago. According to Hubbard, Xenu destroyed billions of captured subjects during Incident II by dropping them into volcanoes and attacking them with nuclear weapons.